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Real-time clock
12.3
Initial firmware
Upon delivery, the ctrlX CORE is provided with the operating system (Linux) including all system-rel-
evant apps and optionally selected apps. The operating system provides commissioning and mainte-
nance functions.
12.4
Booting
The ctrlX CORE control starts booting after switching on the 24 V voltage supply. Booting can be
monitored and checked using the status display.
The status display is red briefly after switching on the 24 V voltage supply. In the initialization phase,
the operating system (Linux) is started, the respective hardware drivers are loaded and the ctrlX CORE
application is then started. The status display of the control is flashing blue during that time. If the
initialization phase is completed, the control is in "Run" mode and the status display is permanently
green.
12.4.1 Secure Boot
Booting is secured by "Secure Boot". Thus, it can only be loaded by a runtime system released by Bosch
Rexroth. For the kernel development, this mechanism can be unlocked using an app and the respective
license.
If the system is unlocked, the status display of the control flashes yellow during each booting. The
warning "080E0305 Bootloader enabled!" is entered into the logbook.
To purchase the app and the license for unlocking purposes, please contact the Bosch Rexroth Service.
NOTICE
12.5
Backing up remanent data
At runtime, remanent data is saved to an internal remanent NVRAM. It is immediately available after
booting.
12.6
Real-time clock
The real-time clock of the control is buffered in the switched-off state using the inserted battery. If no
voltage is applied, the battery buffers the real-time clock for at least 3 years. For notes on changing the
battery, see
⮫ Chapter 14.3 "Battery change " on page
It is recommended to set the time via SNTP.
Bosch Rexroth AG
Limitation of the security functions and the loss of the device warranty by
unlocking the "Secure Boot" mechanism
Unlocking the "Secure Boot mechanism" is at own risk. The productive device
use is not supported anymore. The certification according to IEC 62443 is
lost.
37.
ctrlX CORE
X3
plus
R911420136, Edition 01
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